#pragma once
#include <string>
#include <iostream>
#include <fstream>
#include <vector>
#include <boost/algorithm/string.hpp>
#include "cppjieba/Jieba.hpp"



namespace ns_util{
  class FileUtil{
    public:
      static bool ReadFile(const std::string& file_path, std::string *out){
        std::ifstream in(file_path, std::ios::in);
        if (!in.is_open()){
          std::cerr << "open file" << file_path << "error" << std::endl;
          return false;
        }
        std::string line;
        //如何理解getline返回值是一个引用, 返回的这个类对象重载了强制类型转化，会被强制转换成bool类型
        while (std::getline(in, line)){ 
          *out += line;
        }
        in.close();
        return true;
      }
  };

  class StringUtil{
    public:
      static void Split(const std::string &target, std::vector<std::string> *out, const std::string sep){
        //boost::split
        boost::split(*out, target, boost::is_any_of(sep), boost::token_compress_off);
      }
  };

    const char* const DICT_PATH = "./dict/jieba.dict.utf8";
    const char* const HMM_PATH = "./dict/hmm_model.utf8";
    const char* const USER_DICT_PATH = "./dict/user.dict.utf8";
    const char* const IDF_PATH = "./dict/idf.utf8";
    const char* const STOP_WORD_PATH = "./dict/stop_words.utf8";
    class JiebaUtil{
    private:
      static cppjieba::Jieba jieba;
    public:
      static void CutString(const std::string& src, std::vector<std::string>* out){
        jieba.CutForSearch(src, *out);
      }
  };
    cppjieba::Jieba JiebaUtil::jieba(DICT_PATH,HMM_PATH,USER_DICT_PATH,IDF_PATH,STOP_WORD_PATH);
}
